arm64: add encodings of PIRx_ELx registers

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The encodings used in the permission indirection registers means that the
values that Linux puts in the PTEs do not need to be changed.

The E0 values are replicated in E1, with the execute permissions removed.
This is needed as the futex operations access user mappings with privileged
loads/stores.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20230606145859.697944-16-joey.gouly@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Joey Gouly 2023-06-06 15:58:54 +01:00 • committed by Catalin Marinas

parent 7df7170965

commit eeda243dfe

2 changed files with 58 additions and 0 deletions

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8

arch/arm64/include/asm/pgtable-hwdef.h

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50

arch/arm64/include/asm/pgtable-prot.h

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